Pipette barrel



FIG. 1 is a front view of a pipette barrel showing my new design; and,

FIG. 2 is a perspective view of the design of FIG. 1.

The broken lines immediately adjacent the claimed portions represent the bounds of the claim, and all other broken lines represent unclaimed portions of the pipette barrel. None of the broken lines form a part of the claimed design. 

CLAIM The ornamental design for a pipette barrel, as shown and described. 